Zero contour line label

Dear NCL users,

When I plot press vs time graphics that have a zero contour line, its label
has a minus signal before 0s. I have tried to change this by setting

cnLineLabelFormat = "@^sg"

but I'm getting values like 2.778x10^-17 in the place of the zeros.

How can avoid the minus signal in 0 labels?

Best regards,

-- 
Mateus da Silva Teixeira
Meteorologista
Instituto de Pesquisas Meteorológicas - IPMet
Universidade Estadual Paulista - UNESP
Av. Luis Edmundo Carrijo Coube, 14-01 - Cx. Postal 281 - CEP 17033-360
Bauru - SP - Brasil
Fone: +55 14 3103-6030 / fax: 3203-3649
Registered Linux User #466740 (http://counter.li.org/)

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Received on Tue Nov 17 12:09:48 2009